Question

true/false questions 6. _ obligate aerobes cannot survive without oxygen. 7. _ most bacteria prefer highly alkaline environments for growth. 8. _ aerotolerant anaerobes do not use oxygen but can survive in its presence. 9. _ thioglycolate broth is used to determine the oxygen requirements of bacteria. 10. ___ acidophiles grow best at neutral ph.

Explanation:

• For question 6: Obligate aerobes rely on aerobic respiration and need oxygen to survive, so it's true.
• For question 7: Most bacteria prefer neutral - to slightly acidic environments, not highly alkaline ones, so it's false.
• For question 8: Aerotolerant anaerobes perform fermentation and don't use oxygen but can tolerate its presence, so it's true.
• For question 9: Thioglycolate broth has different oxygen concentrations at different depths and is used to determine bacterial oxygen requirements, so it's true.
• For question 10: Acidophiles grow best in acidic environments, not neutral pH, so it's false.

Answer:

1. True
2. False
3. True
4. True
5. False